Grundfos DDI 209, Инструкция по установке и эксплуатации

Страница: 52 / 76

En
gl
is
h (
G
B)
52
9.9.1 Direct weighting of the current signal input
and output
Weighting while the pump is running can be carried
out in the first function level. The currently set value
increases or decreases for the maximum flow rate
Q
max.
(Q
cal
), or with weighting set value
Q
select mA max.
.
Setting the weighting
1. When the pump is running or stopped, press and
hold down the "Up" button for approximately
5 seconds.
– "0-20 mA" or "4-20 mA", "Analog" and "l/h"
flash in the display.
2. Use the "Up" and "Down" buttons to increase or
decrease the currently set value for the maximum
flow rate.
The curve for current input/current output now
passes as follows:
•
With 0-20 mA (4-20 mA) current signal control,
the curve for current input and current output
passes linearly through Q = 0 at 0 mA (4 mA) and
the currently set value for the maximum flow rate
Q
select max.
at 20 mA (curves 1b and 2b).
Even for current input/current output assignments
that are already weighted in the second function
level (see curve 3a), subsequent weighting can be
set or weighting can be shifted here. The value for
the maximum flow rate Q
select mA max.
at mA
max.
is
shifted (curve 3b).
Fig. 51 Current input and current output with direct weighting
Note
The parameters for 0-20 mA and for
4-20 mA are independent of one
another. The weighting parameters are
modified and saved according to the
set operating mode.
Select the current control used
(0-20 mA / 4-20 mA) before weighting.
Note
Weighting can be set independently of
the current input value that is currently
set. The dosing flow value [l/h] that
corresponds to the set current input
value [mA] always appears in the
display.
Note
The set weighting is saved in the pump.
The values are retained, e.g. when the
power supply is switched off, and are
also active when current weighting is
called in the second function level.
TM
03
66
07
45
06
0 mA 4 mA 8 mA 12 mA 16 mA 20 mA
0
I
in
[mA]
Q [l/h]
I
in
/ I
out
0-20 mA
I
in
4-20 mA
I
out
4-20 mA, manual,
kontakt
1a
2a
1..
2..
Q
max
default (Q
kal
)
10 l/h
4 l/h
1b
2b
Q
select max.
8 l/h
2 l/h
6 l/h
Q
max.
default (Q
cal
)
I
in
/ I
out
0-20 mA
I
in
4-20 mA
I
out
4-20 mA, manual, contact
Q
select max.
I
in
[mA]